title: Interannual variation of water isotopologues at Vostok indicates a contribution from stratospheric water vapor.
abstract: Combined measurements of water isotopologues of a snow pit at Vostok over the past 60 y reveal a unique signature that cannot be explained only by climatic features as usually done. Comparisons of the data using a general circulation model and a simpler isotopic distillation model reveal a stratospheric signature in the (17)O-excess record at Vostok. Our data and theoretical considerations indicate that mass-independent fractionation imprints the isotopic signature of stratospheric water vapor, which may allow for a distinction between stratospheric and tropospheric influences at remote East Antarctic sites.
authors.affiliation: Laboratoire des Sciences du Climat et de l'Environnement [Institut Pierre Simon Laplace (IPSL)/Commissariat à l'Energie Atomique/ Centre National de la Recherche Scientifique (CNRS)/Universite de Versailles Saint Quentin en Yvelines (UVSQ)], 91191 Gif sur Yvette, France.
authors.forename: Renato
authors.initials: R
authors.lastname: Winkler
authors.forename: Amaelle
authors.initials: A
authors.lastname: Landais
authors.forename: Camille
authors.initials: C
authors.lastname: Risi
authors.forename: Melanie
authors.initials: M
authors.lastname: Baroni
authors.forename: Alexey
authors.initials: A
authors.lastname: Ekaykin
authors.forename: Jean
authors.initials: J
authors.lastname: Jouzel
authors.forename: Jean Robert
authors.initials: JR
authors.lastname: Petit
authors.forename: Frederic
authors.initials: F
authors.lastname: Prie
authors.forename: Benedicte
authors.initials: B
authors.lastname: Minster
authors.forename: Sonia
authors.initials: S
authors.lastname: Falourd
mesh_terms: D000864:Antarctic Regions; D001272:Atmosphere / Q000032:analysis*; D001608:Beryllium; D003198:Computer Simulation; D007554:Isotopes / Q000737:chemistry; D008956:Models, Chemical; D012914:Snow / Q000737:chemistry*; D013227:Steam / Q000032:analysis*; D014919:Wind
chemical_list: D007554:Isotopes; D013227:Steam; D001608:Beryllium
keywords: 17O-anomaly; beryllium-10; d-excess; ice core; triple oxygen